Broaching-press.



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(No Model) Patented Dec. 25. |900.

No. 664,6s5.

.1. `A. BAKER.

BROACHING PRESS.

(Application med my s1, 1900.)

2 Sheets-Sheet 2,

(un Model.)-

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UNITED STATES PATENT OFFICE.

JASON'A. BAKER, OF HOUSTON, TEXAS.

BROACHING-PRESS.

SPECIFICATION forming part of Letters Patent No. 664,615, dated December 25, 1900.

Application filed May 31, 1900. Serial No- 18,556. (No model.)

To all wiz/0m it may concern:

Be it known that I, JASON ALONZO BAKER, a citizen of the United States, and a resident of Houston, in the county of Harris and' State of Texas, have invented a new and Improved Broaching-Press, of which the following is a full, clear, and exact description.

The invention relates to metal-working machines; and its object is to provide a new and improved broaching-press which is simple and durable in construction, very effective in operation, and especially designed for broaching brasses or bearings for use on car and other journals and pitmen or other devices, the press being arranged to permit an eX- ceedingly quick and accurate Iinishing of the brasses without the employment of skilled labor.

The invention consists 0f novel features and parts and combinations of the same, as will be fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this speciiication, in which similar characters of reference indicate corresponding parts in all the views.

Figure l is a side elevation of the improvement with parts in section. Fig. 2 isaplan -view of the same. Fig. 3 is an enlarged sectional side elevation of the broaching-head.

Fig. 4 is a sectional plan View of the same on Fig. 5 is a similar view the line L 4 in Fig. 3. of the same on the line ,5 5 in Fig. 8. Fig. 6 is a sectional plan view of the improvement on the line .6 v6 in Fig. 1. Fig. 71s a side ele,- vation of a modified form of the motor for reciprocating the breaching-head, and Fig.' 8

:is a plan View of the same.

` The improved blroaching-press (illustrated in Figs. l to 6) is provided witha broachinghead A, having two circular cutters B B', spaced Aapart and adapted to successively engage brasses O, held in a suitable casing G', set on a platform or table D,- carried by stand; ards-D', bolted or otherwise secured to the head of a cylinder E, in which reciprocates a` piston F, the piston-rod F' of which carries n' the broaching-head A. When the piston F is reciprocated,the broaching-head A is moved downward and then upward and during the downward movement moves first the main cutter B through the brasses to give themain cut to the inner surface of the brasses, and

then the finishingcutter B' follows to give the finishing cut to the inner surface of the brasses.

In order to impart a reciprocating movement to the piston F in the cylinder E, I prefer to use water-pressure for the downstroke and air-pressure for the return or up stroke. For this purpose the upper end of the cylinder E is connected with a hydraulic watersupply G, and the lower end of said cylinder is connected with a Huid-air-pressure supply H. As shown, a pipe G' serves to carry the water to the upper end of the cylinder, and an outlet-pipe G2 leads from said pipe G adjacent to the cylinder, and in the said pipes G' G2 are valves G3 G4, arranged on the same lever, which is under control of the operator, so that the latter can open one valve while closing the other to insure proper iniow of the water through the pipe G at the time the valve Gs is open and the valve G4 is lclosed to force the piston F downward, and when the lever G5 is reversed and the valve G3 is closed and the valve G4 opened then the water can.

escape from the cylinder at the time the piston F is forced upward by air-pressure upon the operator opening the valve H' in the pipe H.

The cutters B B are mounted on a pin B2 and are spaced apart by a collar B3, and the cutter B rests on a washer B4, adjacent to a collar B5 on the pin B2, the lower end B6 of which isthreaded and screws in a sleeve F?, screwing on the upper end of the piston-rod F'. A washer and nut B7 engage the top of the cutter B', so as to hold the same in position on the pin B2 and against the collar B3. By the arrangement described the cutters B B' can be readily taken 0E from the pin B2 and others substituted, and the washers can be differently spaced by using a dilferent-sized collar B8.

On the upper end of the sleeve F2 is arranged a centering-ring K, preferably made in split shape and resting at its lower side on a ring K', held on the sleeve F2, the upper end of said centering-ring K being engaged by the washer B4, previously mentioned, so as to hold the said ring in position between the head A and the upper end of the piston-rod F.v It is evident that when the IOO cutter-head moves downward the centeringring K rst engages the brasses C, so as to properly center the same for the following cutter B to properly cut the brasses, which are subsequently inished by a second cut given by the finishing-cutter B'.

I prefer to give the breaching-head A a turning motion in addition to the reciprocating movement above mentioned, and for this purpose the'piston-rod F is provided with an arm I, on which is journaled a friction-roller I, engaging a spirally-arranged guideway J, carried by the standards D', so that when the piston-rod F moves downward the frictionroller in traveling on the said guideway turns the piston-rod, and with it the breaching-head A, to insure a smooth cut in the brasses. If it is desired to turn the pistonfrod F in an opposite direction, the arm I may be adjusted so that the friction-roller I travels under a guideway J', extending` in an opposite direction to the guideway J.

The motor (shown in Figs. 7 and 8) is actuated solely by water-pressure, and for this purpose water inlet and outlet pipes L L' are connected with the upper end of the cylinder A, and similar pipes N N' are connected with the lower end` of the cylinder E. Sets of valves O O are arranged in the pipes L N and L N', respectively, each set havinga single lever under control of the operator to permit the latter to simultaneously open or close the corresponding pipes for allowing water to How in the cylinder at one end and out at the other end, according to the direction in which the piston F is to be moved at the time.

From the foregoing it is evident that the y device is very simple and d urable in construction, is not liable to get out of order, and permits of quickly and accurately broaching the brasses without the aid of skilled labor, as it requires no centering of the brasses by the workmen.

Patent- Y 1. A breaching-press, comprising a reciprocating head carrying spaced cutters for successively engaging brasses and finishing the same at one operation of the head, a liuidpressure motor forimparting a reciprocating movement to said head, and means, substantially as described, for turning said head during the reciprocating movement, as set forth.

2. A breaching-press, comprising a reciprocating head having spaced cutters, a fluidpressure motor, to the piston-rod of which the cutter-head is secured, and means for imparting a turningl movement to the piston-rod as it is reciprocated, substantially asl described.

3. A breaching-press, comprising a reciprocating head having spaced cutters, a iuidpressure motor, to the piston-rod of which the cutter-head is secured, a spiralguideway, and a roller carried by the piston-rod of the motor and engaging the guideway, substantially as described.

4. A breaching-press, provided with a head having spaced cutters for successively engaging brasses, and a split ring on said head below the main cutter, for centering the brasses previous to the main cutter engaging the brasses, as set forth.

5. In a broachiug-press, the combination of a pin, a sleeve, to which the pin is secured, spaced cutters carried by the pin, and a centering-ring supported by the sleeve and having its upperend engaged by a washer of one of the cutters.

6. In a breaching-press, the combination of a pin having its ends screwsthreaded and provided with a collar adjacent to one end,spaced cutters mounted on the pin, a washer being interposed between the-lower cutter and the collar of the pin, a sleeve internally screwthreaded and into which the pin screws, a ring held on the sleeve, and a split ring between the first-named ring and the said washer, substantially as described.

In testimony whereof I have signed my name to this specilication in the presence of two subscribing witnesses.

JASON A. BAKER.

Witnesses:

ROBT. L. JONES,v A. A. LEARMONTH. 

